Wrench.



0. E. BRADFORD.

WRENCH.

APPLICATION FILED MAB. 25.1909.

Patented Sept. 21, 1909.

31102 n for W1 "uses 5. 723 GEL/062? UNITED STATESWPATENT OFFICE.

CHARLES E. BRADFORD, OF LAKEVIEW, WASHINGTON.

WRENCH.

Specification of Letters Patent. Patient-ed Sept. 21, 1909.

Application filed March 25, 1909. Serial No. 485,734.

To all whom it may concern:

Be it known that I, CHARLES E. BRADFORD, a citizen of the l'nitedStates, residing at Lakeview, in the county of Pierce and State of'ashington, have invented certain new and useful lmprm'ements inWrenches. of-

which the following is a specification. refer ence being had to theaccompanying drawings.

This invention relates to improvements in wrenches of the quickadjusting type.

One object of the invention is to provide a wrench of this characterhaving an improved spring pressed pawl for the movable jaw whereby theimproved wrench may be produced at less cost than similar devicesheretofore used and will, at the same time, be stronger and moredurable.

Another object of the invention is to provide an improved jaw attachmentwhereby a monkey wrench may effectively be used as a pipe wrench.

With the above and other objects in view the invention consists of thenovel features of construction and the combination and arrangement ofparts hereinafter fully described in the claims and illustrated in theaccompanying drawings, in which-- Figure 1 is a side elevation of myimproved wrench with parts in longitudinal section. Fig. 2 is a detailview of the inner face of the lower portion of the shank, Fig. 3 is across section taken on the line 3-3 in Fig. 1, Fig. 4 is a detailperspective of the sprin pressed sleeve which carries the pawl, and l!ig. 5 is a detail perspective of the jaw attachment.

My improved wrench embraces a stationary aw 1 at one end of a shank 2the major portion of which is preferably rectangular sha e in crosssection and the lower end of wlnch is reduced to provide a shoulderedstem 4 for the reception of a hand grip the latter being retained uponthe stem 4 by a nut 6 as is common in devices of this character. Formedupon the inner or bottom face of the shank 2 is a. longitudinal seriesof transverse ratchet teeth 7 which arepreferably cut in said face ofthe shank so as to lie beneath the plane thereof as clearly shown inFigs. 1 and 2 of the drawing. Each of the ratchet teeth 7 has'its upperface disposed in a plane at right angles to the longitudinal axis of theshank 2 and its other face inclined\downwardly and inwardly as shown.

' The wrench also comprises a movable jaw 8 which slides upon the shank2 and has formed integral with it an enlargement or body portion 9. Thelatter has two intersecting openings or passages 10. 11, the former ofwhich receives the shank 2 and the latter of which receives apawlcarrying, spring pressed sleeve 12. This sleeve. as clearly shown inFig. 4, is composed of a U-shaped plate 13 and a pawl block 14, thelatter being arranged between the spaced side portions or arms of theU-shaped plate'13 and secured thereto bv transverse rivets 15. Upon theinner face of the block 14 are formed a plurality of pawlteeth 16 whichengage the ratchet teeth 7 on the shank and which are held in suchengagement by means of a leaf spring 17 arranged beneath and secured bya rivet 18 to the portion 19 of the U-shaped plate 13.

Said portion 19-of the U-shaped plate is formed on its side edges withlongitudinally projecting tongues 20 which extend into and slide inrecesses 21 formed in the outer or top face of the body portion 9 of themovable jaw as clearly shown in Fig. 1. The arrangement of'the tongues20 in the recesses 21 not only causes frame to be more effectivelyguided in its sliding movement in the opening 11, but also protects theends of the spring 1'1 which ends extend into and rest upon the bottomof the recesses 21.

From the foregoing it will be seen that the movable jaw member maybeproduced at a small cost since the two openings 10, 11, therein are cutclear through it and that the provision of the rcccsses 21 for the endsof the springs and the disposition of the protecting tongues 20 oversaid ends of the spring will etl'e'ct'ivcly prcvcnt injury to the springand also prevent the entrance of dirt beneath the same.

T 0 permitthe monke wrench above described to be effectively used as apipe wrench. the jaw attachment 22 shown in Figs. 1 and 5 of thedrawings may be: applied to the stationary jaw l. Said attachmcnt 22 isin tlltIIlgllltlP-Slltl])t(l blockhaving two tlat faces to engage theflat inner face of the jaw l and the inner face of the shank 2. and aninclined face providcd with serrations or teeth 2; \vhcrchy said jawattachment may ctl'cctivclv grip apipc or other object having a curvedsurface? The jaw block or attachmcnt- 22, is rctaincd on thejaw l byproviding in the latter a ocket 24 to receive a rigid the form of asubstantially the pawl carrying stud projecting from the top of the jawltflock, and also by providing in the opposite sides of the shank 2sockets 26 for the reception of spring catches 27 carried by the jawblock. Each of the catches 27, as is more clearly shown in Fig. 5,consists of a spring metal plate 28 havin one end secured by a rivet 29to the jaw %lock 22 and its other end bent inwardly at right angles toprovide a catch finger 30 to enter one of the sockets 26 as indicated indotted lines in Fig. 1. It will be seen that the catch plates 28 may bereadily sprung apart so that their ends 30 may be engaged with ordisengaged from the sockets 26 to permit of the quick and easyapplication of the jaw block 22 to the jaw 1 or its removal therefrom.

Having thus described the invent-ion, what is claimed, is:

1. A wrench comprising a stationary jaw, a shank projecting therefromand formed in its inner face with a longitudinal series of transverseratchet teeth, a slidable jaw having its body portion formed with alongitudinal opening to receive the shank and a transverse openingintersecting the longitudinal one, the outer face of the body beingformed with recesses communicating with said transverse opening, a pawlcarrying sleeve sur-' rounding the shank and arranged in the transverseopening of the movable jaw said sleeve having its outer portion formedwith oppositely projecting tongues to enter and slide in said recesses,and a leaf spring secured Within said sleeve and disposed beneath saidtongues whereby the latter will protect the spring.

2. The combination with a wrench having a stationary jaw, a shankprojecting therefrom and amovable jaw upon the shank and'coacting withthe stationary one, said stationary jaw being formed in its inner facewith a socket and the shank being formed on opposite sides with sockets,of a jaw block having a roughened face, a stud projecting from saidblock to enter the socket in the stationary jaw and spring catchessecured on opposite sides of the jaw block and having inwardly bent endsto enter the sockets in said shank whereby the jaw block is de-.

tachably secured to the stationary jaw.

In testimony whereof I hereunto afliX my signature in the presence oftwo witnesses.

CHARLES BRADFORD. \Vitnesses: I

FRANK YoRK'rHnIMnR, C. J. GOLDTHWAIT.

